Question

The metal used for making $X$-ray tube window is :

• A. $Mg$
• B. $Na$
• C. $Ca$
• D. $Be$

Answer 1

The Correct Option is D

The question asks which metal is used for making X-ray tube windows. The correct answer is Be (Beryllium). Let's look into why Beryllium is the most suitable choice:

1. Transparency to X-Rays: Beryllium is known for its high transparency to X-rays. This transparency is essential for the X-rays generated inside the tube to exit efficiently without significant attenuation.
2. Material Properties: Beryllium has a relatively low atomic number (4) compared to other metals, which contributes to its ability to let X-rays pass through with minimal absorption.
3. Mechanical Strength: Despite being a light metal, beryllium has good mechanical properties that enable it to withstand the physical conditions (like heat) present in an X-ray tube.
4. Comparison with Other Options: - Mg (Magnesium), Na (Sodium), and Ca (Calcium) have higher absorption for X-rays compared to Beryllium because of higher atomic numbers or unsuitable properties like reactivity or instability at high temperatures.

In conclusion, Beryllium's low atomic number and excellent transparency to X-rays, combined with its strength and stability, make it the ideal material for X-ray tube windows.